Supporting and weighting device for the top rolls of textile drawing mechanisms



Nov. 16, 1954 E.

SUPPORTING AND wE F. DAUSCH 2,694,230 IGHTING DEVICE FOR THE TOR ROLLSOF TEXTILE DRAWING NEcHANIsMs 3 Sheets-Sheet l Filed Dec. l2, 1951 Ijim-m. l ...I

Nov. 16, 1954 E. F. DAUscH 2,694,230

SUPPORTING AND WEIGHTING DEVICE FOR THE TOP RoLLs oF TEXTILE DRAWINGMEcHANIsMs Filed Dec. l2, 1951 3 Sheets-Sheet 2 Nov. 16, 1954 F'i ledDeO. l2 1951 E. F. DAUscH 2,694,230 SUPPORTING AND WEIGHTTNO DEVICE FORTEE TOR ROLLS OE TEXTILE DRAWING NEOHANIsMs 5 Sheets-Sheet 5 UnitedStates Patent() SUPPORTING AND WEIGHTING DEVICE FOR THE TOP ROLLS OFTEXTILE DRAWING MECH- ANISMS Erwin Friedrich Dausch, Esslingen, Germany,assignor to Vereinigte Kugellagerfabriken Aktiengesellschaft,Schweinfurt, Germany, a company of Germany This invention relates to asupporting device having weighted guide arms for the top rolls ofdrawing mechanisms as used in textile machines, the guide arms beingpreferably weighted from above. The supporting devices of the kindreferred to include the supporting means proper that extend over thedrawing zone, and guide arms pivotally mounted on supporting pins or thelike to hold the shafts of the pairs of top rolls between the rolls sothat lateral guide cheeks may be dispensed with.

My present invention has for one of its objects to simplify suchsupporting and weighting devices, particularly as far as guide arms andsupporting springs are concerned. At the same time, my invention aims atthe irnprovement of the known supporting and weighting devices withrespect to their practical application. Contrary to conventional designsthat prefer multipiece guide arms, this invention is primarily concernedwith economizing production and operation costs by savings in the weightof materials used, by facilitating the insertion and removal of therolls in case of breakdowns, and by providing a pivotal andpendulum-like suspension of the guide arms by means of supporting pinsor similar means arranged in the supporting unit.

To the accomplishment of the foregoing and other more detailed objectswhich will hereinafter appear, my

invention consists in the supporting and weighting device and itselements, as well as the relation of the latter one to the other, ashereinafter are more particularly described in the specification andsought to be defined in the claims. The specification is accompanied bydrawings in which:

Fig. 1 is a longitudinal cross section through a portion of a supportingdevice embodying features of my invennon;

Fig. 2 is a side view viewed in the direction of the arrow indicated inFig. 1, also fragmentarilyy illustrating a pair of top rolls and theshaft carrying the rolls.

Fig. 3 is a cross section taken in the plane of the line 3-3 of Fig. l;

Fig. 4 shows a longitudinal cross section through a portion of amodified supporting device in its operating position, a pair of toprolls and a pair of bottom rolls being also indicated;

Fig. 5 is a fragmentary longitudinal cross section through anothermodification of a supporting device;

Fig. 6 is a cross section taken approximately in the plane of the line6-6 of Fig. 5, also indicating a top roll;

Fig. 7 is a cross section taken approximately in the plane of the line77 of Fig. 6; p

Fig. 8 shows a medial longitudinal cross section through the pivotal endof a guide arm;

Fig. 9 is a plan view of the pivotal end of the guide arm of Fig. 8;

Fig. 10 is a longitudinal cross section through the front end of afurther modification of a supporting device;

Fig. ll is a cross section taken in the plane of the line 11-11 of Fig.l0;

Fig. l2 is a cross section through the free end of a guide arm; and

Fig. 13 is a plan view of the guide arm of Fig. 12.

Referring to the drawings, and more particularly lto Figs. l to 3,mounted in a supporting unit 1 which may be slidingly arranged isinserted a supporting pin 2 that bears the saddleshaped end of a guidearm 4. The mid- 2,694,230 Patented Nov. 16, 1954 ICC dle portion of thesaddle surface is bent inwardly and contacts the supporting pin 2 alonga circular line.

The free end of the guide arm 4 that carries the top roll shaft 36 (seeFig. 2) is formed as a half sleeve 5 provided withfolded-awayprojections or fiaps 6 for inserting a preloaded retaining or supportingspring 7, the curved portion 38 of which bearsagainst the shaft 36fitted into the half sleeve 5. The shaft has mounted thereon two toprolls 39.

Wing-shaped sections of the guide arm are bent upwardly and combined toa bracket 8 which presses against a stop pin 9 when the supporting unit1 is raised, thus preventing the guide arm 4 from tilting out.

The supporting spring 7 is vso inserted into the guide arm 4 withrespect to the latters abutment like free end 5 that its line of forcedoes not coincide with the direction of the pressure exerted by theloading spring 11 which is' The saddle suspension of the guide arm 4 onthe supporting pin 2 makes possible a pendulum-like setting of the toprolls, carried by the guide arm, parallel to the axis of the bottomrolls. Between the saddle 3 of the guide arm 4 and the lateral Walls ofthe downwardly channel-shaped supporting unit 1, there remains someclearance to allow a displacement of the guide arm 4, thus improving theself-alignment of the top rolls parallel to the axis.

ln the embodiment of Fig. 4, the free end of the guide arm 45 is giventhe shape of a half sleeve designated 51. The half sleeve is providedwith openings and bent portions to receive the supporting spring 57,such openings and bent portions being also shown in Fig. 5. In Fig. 5,the free end of the guide arm 43 is given the same shape as shown inFig. 4. In the latter figure, the half sleeve 35 is provided withopenings 20 and end portions 21 for the insertion of the spring 37. Itwill be understood that the spring 57 (Fig. 4) andf37 (Fig. 5),respectively, bears on the top roll shaft. Both the supporting spring 57and the supporting spring 37 is inserted in such a manner as to berelieved of any pressure exerted by the weighting means. ln Fig. 4, atop roll is designated 40, and a bottom roll is identified by 41.

Referring to Figs. 5 to 9, the end of the guide arm that is mounted onthe supporting pin 2 of the supporting unit 1 is formed as a claw,whereby three essentially semicircular fingers 14, 15and 16 encompassthe pin 2 alternately from above and below.

Where only a swinging motion of the guide arm about the pin 2 isdesirable, the fingers will be provided in such a manner that the twoouter fingers 14 and 16 encircle the pin from above, whereas the middlefinger 15 will contact the pin 2 (from below (see Figs. 5 and 6). Toprevent any play due to possible wear and tear, the fingers willencompass the pin with elastic tensional adherence.

A swinging and at the same time pendulum-like suspension of the guidearm on the supporting pin 2 is obtained with an arrangement of thefingers as shown in the suspension system of Figs. 8 and 9, whereby themiddle finger 1S surrounds the supporting pin from above and the fingers14 and 16 bear against the supporting pin from below. Here some play isleft beweenthe lower fingers and the supporting pin to` facilitate thealignment and to form the cylindrical contact surface of the upperfinger to yield a slight clearance, within the range of the root of thefinger.

To prevent the guide arm from falling out of the supporting unit, theguide arm is partially widened in such a manner that its projectingsurfaces 17 (see Figs. 5, 6 and 7) contact inwardly folded edges 18 orthe like of the lateral walls 19 of the supporting unit 100 if thelatter is lifted. i

According to Fig. l0, I again provide a saddle 'type mounting 3 of theguide arm 44 on the supporting pin 2. The guide arm has two studs 50 tosupport the weighting springs 11 between which is arranged, on thebottom sideof the' g'uid arm, theabutment 55 which forms a halfsleeveand holds -thesupporting spring 47.V The supporting unit 101 isprovided at the forward end with a downwardly directed wall 23 which inturn is provided with aninwardlyb'ent'edge'zz. The free'end of the guidearm 44fi's bentmpwardly toA form av catch 24 the short horizontaledge'-portionZS of; which rests upon the inwardly 'bent-stop edge -22 lassoon "as the rolls are unloaded.

In the particularembodiment-shown in Figs. l2 and 13, the freefend 'of'theguidefar-m 34 has a keylike bentup extension 26, andV theV supportingspring Z7, that is semicircular in its supporting portionand the initialtension of which is increased by providingthe'bends 28 in its prole,carries an-'extension'29 arranged at an angle to theIkeylikef-extensionrrZ ofthe .guide arm. The extension IZ9-se`rves2as a`handle which, upon being depressed towardsY the extension 26,'.easily'sets free the top roll shaft with? the top-rolls.

At the'ordinary'operating pressure, the top portion of-'the retainingspring '27 that may, for example, be fastenedY totheguidefarml by meansof rivets Sil-will contact the bight portion 31 of the guide arm, thuspreventing anyundue strain onthe retaining spring.

By embossing'the up-drawn 'edges 32 of the guide arm 34 to asem'icircular shape, a'cup 33inay be formed to hold the weightingsprings(not shown).

Fibre liiow usually occurs from the suspension end to the free end ofthe guide arm. In case the pendulum-like movement is not employed,;theguide arm may also be assembled to havethe-tibre flowing in the oppositedirection.1

It is believed that the .construction and'function of the forms shownofthe device according to my invention will be understood from theforegoing detailed description thereof. It is `a feature of theinventionthat the guide arm consists of .a preferably single profiled body forming the lower support of the weighting means, whereby one end ofthe'guide' arm encompasses ina pivotal way a carrier' pin 'or a similarmember fastened to the supporting unit. The bottom' of' the guide arm istted with a supporting spring that is'preferably inserted in "anabutment and designed to'hold the shaft of the top rolls. The supportingspring is preferably so mounted on the guide arm, with respect to theabutmentlike free end of the latter, that the line ofA contact betweenthe'spring and the shaft of thetop roll lies onsuch portion of thecylindrical sur face of the top rollsshaft as is opposite to the bottomroll. This prevents :any unfavorable influence of the pressure forcesexertedbythe loading spring upon the supporting spring.

The guide arm may consist, according to the invention, of an embossedand punched piece, such as a profiled sheet metal piece; adie-cast`bodyg'or a proled body made of plastic material that'^is"deforma'blewhen hot.

The advantagesof the device of my invention will also be clear from theforegoing -detailed description. Essentially, these advantages centerabout the following features. There willbe a reduction of the specificsurface pressures. Thefself-aligning of the top rolls parallel to theaxis of the'botton rolls will be guaranteed even though it wouldnot bepossible to place the supporting unit, while mounting same, in aposition exactly perpendicular to the axis ofthe bottom rolls. Anunfavorable inuence of the weighting` pressure upon the elasticallyformed parts of the shaft holders to the-top rolls will be avoided.

It will be apparent that while I have shown and described mv inventioninpreferred'forms, many 'changes and modifications may be made withoutdeparting from the spirit of the invention defined in the followingclaims.

I claim:

1. In a .supporting 'and weighting device for the top rolls of drawingmechanisms of textile machinery, wherein a supporting unit extends over'at least one pair of top rolls and a shaft is provided for eachexistingpair of top rolls, at least a single guide arm, atleast a singleguide arm support secured to said-unit, resilient loading means, and atleast a ysingle supporting spring, said guide arm supporting saidloading means,'one end'of the Vguide arm being pivoted on the guide-armsupport, the guide arm forming near its other or free end an abutment,said supporting spring 'ittingiri the abutine'ntandholding the saidshaft.'

A2.v In the device according to claim 1, a pin serving as 'said 'guideariirsupport,said end of the guide arm at least partly enclosing thesupporting pin for swinging motionsof the guide arm.

3. In the device according to claim 1, wherein bottom rolls areprovided, said supporting spring being arranged so that the line of itscontact with the top roll shaft faces the bottom rolls.

4. In the device according to claim 1, a pin serving as said guide. armsupport, said end of the guide arm being saddle-shaped and at the sametime shaped so as to at least partly enclose the supporting pin forswinging motion of the guide arrn.

5. In the device according to'claim 4, said saddle surface beingmedially inwardly-curved and contactingxthe supporting pin along acircular line.

6.y Inthe device according to claim 1, a pin serving as said guide armsupport, said pivoted end of the guide arm being claw-shaped, thefingers of the claw alternately enclosing the supporting pin from aboveand below.

7. In the device according to claim 1, said pivotal end of the guide armbeing formed to contact the guide arm support for a swinging fand apendulum-like motion. of the guide arm.

8. In the 'device according to claim l, the supporting unit havingincross. sectionand operating position the shape of an inverted U, theguide arm'being provided on the side looking'towardthe web of the U withat least one stud to support at least one weighting spring serving assaid loading means', .theweighting spring .bearing against the web'ofthe U.

9. In Ithe device-according to claim 1, a stop pin being p'rovided'inthe'supporting Unit, the guide arm being pro-A vided withwings adaptedto strike against the stoppin when'said unit is liftedyand thus toprevent falling-out of the 'guidearm fromthe'supporting unit.

10. In the device'according'to claim l, the abutment having. the-shapeof.a 'half sleeve and being provided with flaps', the -supporting'springbeing shaped and arranged to` bear upon said iiaps.`

11` Inthe' de'vicefacco'rding to' claim 1, the abutment having fthe'shape-'ofy a half 'sleeve and being provided with apertures`-andf'portionsbent'away, said apertures and portions receiving thesupporting'spring. i 12. In the device according yto claim 1, thesupportingunit-having'in cross section and operating position theshape'ofa channelof inverted U-form, the side walls of' the channelhaving inwardly -berit edge portions, the sides of the"guide'arm'contacting, upon unloading of the drawing mechanism, saidedge portions.

13. Inthedeviceaccording to claim l, the' supporting unit having incross'sectionfand 'operating position the shape of a channel of invertedU-form, said channel beingprovided at thev forwardend with a downwardlydirected wall, the'said Ywall having an inwardly bent edge, the guidearm terminating at the forward end in an upwardly extending portionhaving an outwardly directed edge, theiatter edge resting upon theformer'edge when the drawing mechanism isi unloaded.

14. In thegdevice according to claim 1, the guide arm having at the freeend a keylike extension, the supporting's'pring forming. a sernicircularsupport portion and terminating in an extension-forming an acute anglewith the first named `extension and serving as'a handle.

15. In the device according to claim 1, wherein there are pairs of'rolls, -saidpivotal end of the guide arm being formed -to contact theguide arm support for a swinging motion of the guide arm, the guide armbeing mounted in the supporting unit for the iibre to pass through thepairs vof rolls 'in the direction from the'free end of the guide arm tothe pivotal end.

16. I n the device Vaccordingto claim 1, the supporting spring havingacurved portion, said portion bearing against the shaft.

References Cited in the tile of this patent UNITED STATES 'PATENTSNumber l Name Date 2,100,139 Honda Nov. 23, 1937 2,306,849 ToenniessenDec. 29, 1942 2,492,082 Woods a Dec. 20, 1949 2,508,964 Naegeli f May23, 1950 2,597,850 Batista May 27, 1952 2,601,705 Stahlecker July 1,1952 2,644,988 Haythornthwaite et al. July 14, 1953

